A conveying device for molded PLA cups

Abstract

The application provides a conveying device for forming a PLA cup, comprising a conveying assembly, an auxiliary roller and a conveying frame. The conveying assembly comprises a plurality of conveying belts arranged side by side. The rolling shaft of the auxiliary roller is arranged perpendicularly to the conveying direction of the conveying belts. The distance between the lowest end of the auxiliary roller and the highest point of the conveying belts is less than the maximum height of the cup. The conveying frame is divided into a sorting area and a sequencing area by the rotating shaft of the auxiliary roller. The sorting area comprises a movable space below the conveying belts for providing a movable gap for the bottom of the cup. The sequencing area comprises a stop plate below the conveying belts for stopping the bottom of the cup to make the cup lie flat, and a limiting plate installed on the conveying frame and located at the end of the conveying belts. The application sorts and sequences through the conveying assembly, and the auxiliary roller pushes the disordered cups back to realize auxiliary sorting and sequencing.

Description

[0001] This invention patent application is a divisional application of Chinese patent application number 202011631093.X. The original application number is 202011631093.X, the application date is December 30, 2020, and the invention title is a PLA cup intelligent manufacturing device and process. Technical Field

[0002] This invention relates to the field of daily necessities manufacturing technology, specifically to a transfer device for molding PLA cups. Background Technology

[0003] Disposable cups are commonly used and convenient in daily life. However, existing ones are all single-layered, which has poor heat insulation and may cause accidental burns. Double-layered insulated cups are relatively rare and more complicated to produce.

[0004] In view of this, the inventors of this case conducted in-depth research on the above-mentioned problems, which led to the creation of this case. Summary of the Invention

[0005] The purpose of this invention is to provide a conveying device for forming PLA cups that can quickly and automatically produce double-layer cups and automatically stack them for convenient packaging.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A conveying device for forming PLA cups, characterized in that it includes a conveying component for sorting cups, an auxiliary roller mounted on the conveying component for pushing over and retracting disordered cups to assist in sorting and ranking, and a conveying frame for mounting the conveying component and the auxiliary roller; the conveying component includes multiple conveyor belts arranged side by side; the rolling axis of the auxiliary roller is perpendicular to the conveying direction of the conveyor belts, and the distance between the lowest point of the auxiliary roller and the highest point of the conveyor belt is less than the maximum height of the cup; the conveying frame is divided into a sorting area and a ranking area by the rotation axis of the auxiliary rollers, the sorting area includes an active space located below the conveyor belts to provide a clearance for the bottom of the cups, and the ranking area includes a support plate located below the conveyor belts to push against the bottom of the cups so that the cups lie flat, and a limiting plate mounted on the conveying frame and located at the end of the conveyor belts.

[0008] Furthermore, there is a sorting gap between adjacent conveyor belts, with a spacing smaller than the maximum diameter of the cup.

[0009] After adopting the above technical solution, the conveying device for forming PLA cups of the present invention sorts and arranges the cups through the conveying components, and the auxiliary roller pushes down and backs the messy cups to achieve auxiliary sorting and arrangement; when the cup falls to the conveying components, the cup mouth will be stuck between the adjacent conveyor belts with the cup bottom facing, and then it will be transported by the conveyor belt past the auxiliary roller, and the cup bottom will hit the top plate. The conveyor belt will continue to transport, so that the cup bottom will be placed above the top plate, making the cup lie flat and the cup mouth will contact the limiting plate. The subsequent cup will be put on the previous cup to form an arrangement. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the PLA cup intelligent manufacturing device of the present invention;

[0011] Figure 2 This is a schematic diagram of the inner wall forming machine of the present invention;

[0012] Figure 3 This is a detailed structural diagram of the inner wall forming machine of the present invention;

[0013] Figure 4 This is a schematic cross-sectional view of the template structure of the present invention;

[0014] Figure 5 This is a schematic diagram of the outer wall forming machine of the present invention;

[0015] Figure 6 This is a detailed structural schematic diagram of the outer wall forming machine of the present invention;

[0016] Figure 7 This is a schematic diagram of the structure of the top mold column of the present invention;

[0017] Figure 8 This is a schematic diagram of the structure of the suction gripper of the present invention;

[0018] Figure 9 This is a schematic diagram of the transmission device of the present invention;

[0019] Figure 10 This is a schematic diagram of the structure of the transmission belt of the present invention.

[0020] In the picture:

[0021] Inner wall forming machine 1, lower film assembly 11, heating element 12, feeder 13, mounting frame 14, forming template 15, lifting element 16, forming cavity 17, air suction layer 18, air hole 19, air suction hole 110, heating plate 111, pushing cylinder 112, conveying drum 113, PLA material film 114, collecting drum 115, guide element 116, first guide roller 117, roller assembly 118;

[0022] 2. Outer wall molding machine, 21. Lower mold injection part, 22. Upper mold injection part, 23. Support frame, 24. Receiving cavity, 25. Top mold column, 26. Drive cylinder, 27. Molding strip;

[0023] Assembly device 3, operating table 31, suction gripper 32, transmission device 33, horizontal drive track 34, first sliding member 35, second sliding member 36, adsorption plate 37, lifting cylinder 38, horizontal mover 39, transmission assembly 310, transmission frame 311, auxiliary roller 312, transmission belt 313, top plate 314, limit plate 315, heating and compaction component 316. Detailed Implementation

[0024] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0025] like Figures 1-10 As shown, a PLA cup intelligent manufacturing device of the present invention includes an inner wall forming machine 1 for forming the inner wall of the cup, an outer wall forming machine 2 for injection molding the outer wall of the cup and having a support strip connected to the inner wall of the cup, and an assembly device 3 for assembling the inner wall and outer wall of the cup. The inner wall and outer wall of the cup are formed by the inner wall forming machine 1 and the outer wall forming machine 2, and then assembled by the assembly device 3 to form two layers of cup wall, thereby achieving a heat insulation effect.

[0026] Preferably, the inner wall forming machine 1 includes a lower film assembly 11 formed by adsorption, a heating element 12 located above the lower film assembly 11 for heating the material forming the inner wall of the cup, a feeder 13 for conveying material between the lower film assembly 11 and the heating element 12, and a mounting bracket 14 for mounting the lower film assembly 11 and the heating element 12. The feeder 13 conveys the material between the lower film assembly 11 and the heating element 12, and then the heating element 12 presses down to heat and soften the material. The lower film assembly 11 then forms an adsorption force on the heated material to adhere it to the lower mold assembly to form the cup wall.

[0027] Preferably, the lower film assembly 11 includes a template 15 that forms the inner walls of multiple cups by adsorption, and a lifting member 16 that drives the template 15 to rise and fall. The lifting member 16 pushes the template 15 to fit under the material, and then the template 15 activates to adsorb the material and attach it to the film forming plate to form the inner walls of multiple cups.

[0028] Preferably, the forming template 15 includes a plurality of forming cavities 17 for attaching and forming materials, and an air-absorbing layer 18 located below the plurality of forming cavities 17 and communicating with each forming cavity 17. The air-absorbing layer 18 draws air from the forming cavity 17, thereby causing the forming cavity 17 to adsorb material and form the inner wall of the cup.

[0029] Preferably, each molding cavity 17 has an air hole 19 at its bottom that communicates with the air suction layer 18; the air suction layer 18 has an air suction hole 110 at its bottom that connects to an external air extraction machine. By connecting the air suction layer 18 to the air extraction machine, air can be extracted from each molding cavity 17 separately.

[0030] Preferably, the heating element 12 includes a heating plate 111 for heating, and a push cylinder 112 mounted on the mounting bracket 14 to drive the heating plate 111 toward the lower film assembly 11. The heating plate 111 is moved by the push cylinder 112 to heat the bonding material.

[0031] Preferably, the feeder 13 includes a conveyor drum 113 for conveying material, a PLA material film 114 wound on the conveyor drum 113, a collection drum 115 for collecting the used PLA material film 114, and two guide members 116 symmetrically mounted on the mounting frame 14 for guiding. Material is fed through the conveyor drum 113, and the guide members 116 ensure the material is flat. After use, the PLA material film 114 is recycled and reused through the collection drum 115.

[0032] Preferably, the guide member 116 includes a first guide roller 117 that adheres to the lower part of the PLA material film 114, and a roller assembly 118 that holds the PLA material film 114. The first guide roller 117 performs the first guidance, and the roller assembly 118 performs the flattening guidance while holding the PLA material film 114.

[0033] Preferably, the roller assembly 118 includes a second guide roller located below the PLA material film 114 and a third guide roller located above the PLA material film 114. The second guide roller and the third guide roller cooperate with each other to adhere to the upper and lower surfaces of the PLA material film 114, respectively.

[0034] Preferably, the outer wall forming machine 2 includes a lower mold injection molding part 21 for forming the outer wall of the cup, an upper mold injection molding part 22 that cooperates with the lower mold part, and a support frame 23 for mounting the lower mold injection molding part 21 and the upper mold injection molding part 22. The outer wall of the cup is formed by injection molding through the movement of the upper mold injection molding part 22 toward the lower mold injection molding part 21.

[0035] Preferably, the upper mold injection part 22 includes a plurality of top mold posts 25 that match the receiving cavity 24, and a drive cylinder 26 for driving the top mold posts 25 into the receiving cavity 24. The drive cylinder 26 drives the top mold posts 25 into the receiving cavity 24 and then injection molding begins.

[0036] Preferably, the top mold post 25 is an inverted frustum shape, wider at the top and narrower at the bottom. Multiple molding strips 27 are formed along the circumference of the top circular part of the top mold post 25. There are gaps between adjacent molding strips 27. Injection material flows into these gaps to form connecting strips that connect with the inner wall of the cup.

[0037] Preferably, the assembly device 3 includes an operating table 31 connected between the inner wall forming machine 1 and the outer wall forming machine 2, a suction gripper 32 movably mounted on the operating table 31 to pick up the inner wall of the cup, and a conveying device 33 located on one side of the operating table 31 to transport the formed cup. The outer wall of the cup formed by the outer wall forming machine 2 is moved to the operating table 31, and then the inner wall of the cup is picked up by the suction gripper 32 and embedded into the outer wall of the cup to form a complete cup, which is then placed into the conveying device 33 for transport.

[0038] Preferably, the operating table 31 is provided with a horizontal drive rail 34 extending along the mounting frame 14 and the support frame 23 respectively; the horizontal drive rail 34 is slidably mounted with a first sliding member 35 connected to the lower film assembly 11 and a second sliding member 36 connected to the lower mold injection part 21. The first sliding member 35 drives the lower film assembly 11 to move along the horizontal drive rail 34 and place it below the suction gripper 32, then the inner wall of the cup is suctioned by the suction gripper 32. After the inner wall of the cup is suctioned by the suction gripper 32, the second sliding member 36 drives the lower mold injection part 21 to move below the suction gripper 32, then the suction gripper 32 drives the inner wall of the cup to be placed inside the outer wall of the cup of the lower mold injection part 21, then the outer wall of the cup is heated to soften it, and after cooling, the outer wall of the cup and the inner wall of the cup are adhered.

[0039] Preferably, the suction gripper 32 includes an adsorption plate 37 for adsorbing the inside of the cup, a lifting cylinder 38 for driving the adsorption plate 37 to move up and down, and a horizontal mover 39 that is mounted on the upper part of the operating table 31 and fixedly connected to the lifting cylinder 38. The horizontal mover 39 drives the lifting cylinder 38 to move and adjust its position on the operating table 31, and then the lifting cylinder 38 drives the adsorption plate 37 to adsorb and grip the inner wall of the cup.

[0040] Preferably, the adsorption plate 37 includes a plurality of adsorption holes corresponding to a plurality of forming cavities 17. This allows for better adsorption of the inner wall of the cup, with each hole adsorbing one cavity at a time.

[0041] Preferably, the operating table is equipped with a heating and compacting element 316 at the input end of the transmission device, which heats the inner and outer walls of the cup during assembly. After the suction gripper 32 picks up the inner wall of the cup and places it into the outer wall of the cup, the heating and compacting element 316 descends to contact the inner and outer walls of the cup, and then heats them to soften the outer and inner walls, and then the cold areas adhere together.

[0042] Preferably, the heating and compacting component 316 includes a heating plate and an up-and-down driving cylinder mounted on the operating table 31 to drive the heating plate to move up and down.

[0043] Reference Appendix Figure 9-10As shown, preferably, the conveying device 33 includes a conveying component 310 for conveying and sorting cups, a conveying frame 311 for mounting the conveying component 310, and an auxiliary roller 312 mounted above the auxiliary conveying component 310. Sorting and sorting are performed via the conveying component 310, and the auxiliary roller 312 pushes over and retracts disordered cups to achieve assisted sorting and sorting.

[0044] Preferably, the transmission assembly 310 includes multiple transmission belts 313 arranged side by side; adjacent transmission belts 313 have a sorting gap with a spacing smaller than the maximum diameter of the cup; the transmission frame 311 is divided into a sorting area and a sorting area by the rotation axis of the auxiliary roller 312; the sorting area includes an active space located below the transmission belts 313 to provide an active gap for the bottom of the cup, and the sorting area includes a support plate 314 located below the transmission belts 313 to support the bottom of the cup so that the cup lies flat, and a limiting plate 315 installed on the transmission frame 311 at the end of the transmission of the transmission belts 313. When the cup falls onto the conveyor assembly 310, the rim of the cup will be caught between the adjacent conveyor belts 313 with the bottom of the cup facing outwards. Then, it will be transported by the conveyor belts 313 under the auxiliary rollers 312 and continue to be transported until the bottom of the cup touches the top plate 314. The conveyor belts 313 will continue to transport the cup, so that the bottom of the cup will be placed above the top plate 314, making the cup lie flat and the rim of the cup will contact the limiting plate 315. The next cup will then be placed on top of the previous cup to form a sequence.

[0045] Preferably, the rolling shaft of the auxiliary roller 312 is arranged perpendicular to the transmission direction of the conveyor belt 313, and the distance between the lowest point of the auxiliary roller 312 and the highest point of the conveyor belt 313 is less than the maximum height of the cup.

[0046] A smart manufacturing process for PLA cups includes the following steps:

[0047] a. Simultaneously manufacture the inner and outer walls of the cup;

[0048] b. Heat the outer wall of the cup, and the connecting strip will adhere to the inner wall of the cup to form the complete cup;

[0049] c. Sort and stack the cups.

[0050] Preferably, in step a, the inner wall forming machine 1 and the outer wall forming machine 2 are used simultaneously for adsorption and injection molding to form the inner wall and outer wall of the cup, respectively; the feeder 13 transmits the material between the lower mold assembly 11 and the heating element 12, the heating element 12 presses down to heat the material and soften it, the lower mold assembly 11 forms a suction force on the heated material and attaches it to the lower mold assembly to form the cup wall; the upper mold injection part 22 moves toward the lower mold injection part 21 to cooperate with injection molding to form the outer wall of the cup.

[0051] Preferably, in step b, the assembly device 3 is used to assemble the inner wall and outer wall of the cup; the outer wall of the cup formed by the outer wall forming machine 2 is moved to the operating table 31, and the suction gripper 32 picks up the inner wall of the cup and embeds it into the outer wall of the cup to form a complete cup.

[0052] Preferably, in step c, the cups are sorted, transported and stacked using the conveyor device 33; the cups fall into the conveyor assembly 310, with the cup mouths caught between adjacent conveyor belts 313 and the cup bottoms facing upwards. The conveyor belts 313 transport the cups below the auxiliary rollers 312 and continue transporting them until the bottoms of the cups abut against the top plate 314. The conveyor belts 313 continue transporting the cups until the bottoms of the cups are positioned above the top plate 314, causing the cups to lie flat and the cup mouths to contact the limiting plate 315. The next cup will then be placed on top of the previous cup to form a sequence.

[0053] The product form of the present invention is not limited to the illustrations and embodiments shown in this case. Any appropriate changes or modifications made to it based on similar ideas should be considered as not departing from the patent scope of the present invention.

Claims

1. A conveying device for forming PLA cups, applied to an intelligent manufacturing device for PLA cups, characterized in that: The PLA cup intelligent manufacturing device includes an inner wall forming machine for forming the inner wall of the cup, an outer wall forming machine for injection molding the outer wall of the cup, and an assembly device for assembling the inner and outer walls of the cup into two layers of cup wall. The assembly device includes an operating table, a suction gripper movably mounted on the operating table for sucking up the inner wall of the cup, and a conveying device located on one side of the operating table for conveying the assembled cup. The operating table is equipped with a heating and compacting component at the input end of the transmission device. The heating and compacting component includes a heating plate and an up-and-down driving cylinder installed on the operating table to drive the heating plate to move up and down. After the inner wall of the cup is picked up and placed into the outer wall of the cup, the heating and compacting component descends to contact the inner wall and the outer wall of the cup. The heating softens the outer wall and the inner wall of the cup and then they stick together. The conveying device includes a conveying component for sorting cups, an auxiliary roller mounted on the conveying component to push over and retract disordered cups to assist in sorting and ranking, and a conveying frame for mounting the conveying component and the auxiliary roller. The conveying component includes multiple conveyor belts arranged side by side. The rolling axis of the auxiliary roller is perpendicular to the conveying direction of the conveyor belt, and the distance between the lowest point of the auxiliary roller and the highest point of the conveyor belt is less than the maximum height of the cup. The conveying frame is divided into a sorting area and a ranking area by the rotation axis of the auxiliary roller. The sorting area includes an active space located below the conveyor belt to provide a clearance for the bottom of the cup. The ranking area includes a support plate located below the conveyor belt to push against the bottom of the cup so that the cup lies flat, and a limiting plate mounted on the conveying frame and located at the end of the conveyor belt.

2. The conveying device for forming a PLA cup according to claim 1, characterized in that: The adjacent conveyor belts have a sorting gap with a spacing smaller than the maximum diameter of the cup.

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